Seventh Circle Audio

Posted: **Sat Dec 10, 2005 4:35 pm**

I have finished 2 more C84s.
First o ne is perfect.
The second one does not pass signal.

All the voltages read correct.
I have adjusted the regulators so 4th pin of opamps reads -18V and the 8th pin of opamps reads 18v.

However, when i turn the trim knob, the pre makes noise but does not pass signal otherwise.

Any ideas?

Posted: **Sat Dec 10, 2005 4:52 pm**

It only passes signal when the GAIN is set to the first click.
But turning the trim still makes noise...

I am stumped.

Posted: **Sat Dec 10, 2005 5:09 pm**

And... it only happens when phantom is turned on but, the signal is too hot when an sm-57 is connected.

Posted: **Mon Dec 12, 2005 9:12 pm**

Sorry for the confusion.
It does not do it only when the phantom is turned on.
It alwaysdoes it.
Meaning... No sound unless gain is at the step 1 of 12.
And.. Trim Pot makes noise.
I am stumped.
Somebody please help.

Posted: **Sat Mar 17, 2007 10:08 pm**

yeah! I have a similar problem....I'm stumped!!

Seventh Circle Audio

R29 Gain contrl just makes noise but does not pass signal, p

R29 Gain contrl just makes noise but does not pass signal, p